Direct X Acceleration "Not Available."

First, here is the basic information about my 2009 MacBook Pro:OS X 10.8.2 (12C60)Processor: 2.26 GHz Intel Core 2 DuoMemory: 4 GB 1067 MHz DDR3Graphics: NVIDIA GeForce 9400M 256 MB--I have used boot camp to create a Windows Partition on my Mac and have installed Windows 7. The main reason I did so was for gaming purposes. When running Windows, when I attempt to run a game (Arma II), I get an error regarding my Display Adapter. Using Device Manager I made sure that the Display Adapter software had been updated, so I'm not sure that's the issue. The main problem is that Direct X Acceleration and Direct X 3D are "Not Available." I'm trying to find some way to enable the Direct X components and I'm not sure what to do. Is this a problem with the graphics card?

Also, I still have roughly 200 free GB on my Windows partition, in case anyone was wondering.

I'm really keen on running games on my Mac as opposed to purchasing a separate PC and if anyone could help me with this problem it would be much appreciated.